Short wavelength, spin-polarized quantum-well states in high quality Cu films on FCC-Co(100)

The electronic structure of ultrathin Cu films deposited on top of an FCC-C o(1 0 0) filmhas been studied by angle- and spin-resolved photoemission. De position at liquid-nitrogen temperature allows the formation of sharp inter faces that produces well-defined quantum-well states in the Cu valence band . Furthermore, short-wavelength quantum-well states originating from the ne ck of the Cu Fermi surface are only visible after low-temperature depositio n. Spin-resolved spectra show that these states, which are predicted to dom inate oscillatory magnetic coupling in multilayers, exhibit minority spin c haracter. (C) 1999 Elsevier Science B.V. All rights reserved.